Type D、DLmulti-grade pump is a horizontal single -absorbing multi-section centrifuge one whichto transfer cleanwater(impurity less than 1%)and the other corrosive liquid whose physicfeatures is similar toclean water according todifferent rawmaterials.D、DLtype pump made by common materials is only to transfer themedias whose temp.No—ore than 20℃,and one by special materials,the neutral or little corrosive liquid,or clean or little particle's one in the lineofchemical,pharmaceutical,petrol,metallurgy,and environment,etc.